Engine cap



FIG. 1. is a perspective view of an engine cap showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

The broken lines depict portions of the engine cap that form no part of the claimed design. 

CLAIM The ornamental design for an engine cap, as shown and described. 